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Financial Risk Management - Summary of Committed Credit Facilities (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2024 USD ($)
Multi-currency revolving credit facility [member] |
Disclosure Of Line Of Credit Facility [Line Items] |
Amount | $ 2,000
Utilized | 0
Unutilized | 2,000
Liquidity revolving credit facility [Member] |
Disclosure Of Line Of Credit Facility [Line Items] |
Amount | 1,000
Utilized | 0
Unutilized | $ 1,000

X
- Definition Committed credit facilities, amount. + References No definition available. + Details
Name: | eric_CommittedCreditFacilitiesAmount
Namespace Prefix: | eric_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Committed credit facilities, unutilized. + References No definition available. + Details
Name: | eric_CommittedCreditFacilitiesUnutilized
Namespace Prefix: | eric_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Committed credit facilities, utilized. + References No definition available. + Details
Name: | eric_CommittedCreditFacilitiesUtilized
Namespace Prefix: | eric_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Disclosure of line of credit facility table line items. + References No definition available. + Details
Name: | eric_DisclosureOfLineOfCreditFacilityLineItems
Namespace Prefix: | eric_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=eric_MulticurrencyRevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=eric_LiquidityRevolvingCreditFacilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |